body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    text-align: center;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 500px;
    margin: 50px auto;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.container h3 {
    margin-bottom: 20px;
    font-size: 18px;
    color: #333333;
}
.btn {
    display: inline-block;
    margin: 10px 0;
    padding: 10px 20px;
    font-size: 16px;
    color: #ffffff;
    background-color: #4CAF50;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover {
    background-color: #388E3C;
}
.timer {
    margin: 20px 0;
    font-size: 16px;
    color: #e74c3c;
}
.image-container img {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
}